trade up from
trade up from (something)
To exchange something smaller, less expensive, or inferior in quality (for something better, larger, or more expensive). We just had our second child, so we'll need to trade up from our tiny hatchback. They've got a lot of great deals at the moment if you're looking to trade up from your crappy old laptop.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
trade up from something
to exchange a specific lower-level product for a higher-level product. I decided to trade up from my little car to a much larger one. I can't afford what I have, let alone be able to trade up to anything.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.